Microbial lipid production from soybean hulls using Lipomyces starkeyi LPB53 in a circular economy

[Display omitted] •Soy hulls are a significant source of cellulose and hemicellulose.•Lipomyces starkeyi LPB 53 consumed 65% of the xylose and 99% of the glucose.•Maximum accumulation of lipids by the yeast was 42.5%•Microbial oil was composed of fatty acids with 16 and 18 carbons chains. Soybean hu...

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Bibliographic Details
Published in:Bioresource technology 2023-03, Vol.372, p.128650-128650, Article 128650
Main Authors: Martinez-Burgos, Walter J., Porto de Souza Vandenberghe, Luciana, Karp, Susan Grace, Murawski de Mello, Ariane Fátima, Thomaz Soccol, Vanete, Soccol, Carlos Ricardo
Format: Article
Language:English
Subjects:
Cellulose
Fermentation
Glycine max
Hemicellulose
Lipids
Lipomyces
Soybean hulls
Xylose
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Summary:[Display omitted] •Soy hulls are a significant source of cellulose and hemicellulose.•Lipomyces starkeyi LPB 53 consumed 65% of the xylose and 99% of the glucose.•Maximum accumulation of lipids by the yeast was 42.5%•Microbial oil was composed of fatty acids with 16 and 18 carbons chains. Soybean hulls are lignocellulosic residuesgeneratedinthe industrial processing of soybean, representing about 5 % of the mass of the whole bean. This by-product isan importantsource of polymers suchas cellulose(34 %) and hemicellulose (11 %),which could bevalorizedvia biotechnology to improvethe economic returnof the oilseed chain. In the present work,soybean hulls were evaluated as a carbon sourcefor biolipid productionbyLipomycesstarkeyi LPB 53. Initially the hulls were treated physicochemically and enzymatically to obtain fermentable sugars. Subsequently, biomass growth was evaluated using different nitrogen sources andthe lipid production was optimized, reaching a maximum cell biomass concentration of 26.5 g/L with 42.5 % of lipids. Around 65 % of the xylose content was consumed.The obtained oil wasmajorlycomposed of oleic, palmitic, palmitoleic, linoleic and stearic fatty acids in a proportion of 54 %, 32 %, 4 %, 3 % and 2 %, respectively.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2023.128650